feat(content): .NET example (#105)

* feat(content): .NET example

* remove port metadata

Author: thomas-tacquet

README.md

@@ -76,6 +76,7 @@ Table of Contents:
 | **[Terraform NGINX hello world](containers/terraform-nginx-hello-world/README.md)** <br/> A minimal example running the base NGINX image in a serverless container deployed with Terraform. | N/A          | [Terraform]            |
 | **[Triggers with Terraform](containers/terraform-triggers/README.md)** <br/> Configuring two SQS triggers, used to trigger two containers, one public, one private.                         | N/A          | [Terraform]            |
 | **[gRPC HTTP2 in Go](containers/grpc-http2-go/README.md)** <br/> A Go gRPC Container using http2                                                                                            | Go/Protobuf  | [CLI]                  |
+| **[.NET C#](containers/csharp-hello-world)** <br/> A .NET C# Container hello world                                                                                                          | C# .NET      | [CLI]                  |
 | **[Ruby Hello World](containers/ruby-hello-world/)** <br/> A simple Ruby Hello world Container                                                                                              | Ruby         | [CLI]                  |
 
 ### ⚙️ Jobs

containers/csharp-hello-world/Dockerfile

@@ -0,0 +1,17 @@
+# Use the official .NET runtime image.
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+WORKDIR /app
+
+# Build stage
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+WORKDIR /src
+COPY *.csproj .
+RUN dotnet restore
+COPY . .
+RUN dotnet publish -c Release -o /app
+
+# Final stage
+FROM base AS final
+WORKDIR /app
+COPY --from=build /app .
+ENTRYPOINT ["dotnet", "HelloWorldApp.dll"]

containers/csharp-hello-world/HelloWorldApp.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+</Project>

containers/csharp-hello-world/Program.cs

@@ -0,0 +1,11 @@
+var builder = WebApplication.CreateBuilder(args);
+
+// Get PORT from environment, default to 8080 if not set
+var port = Environment.GetEnvironmentVariable("PORT") ?? "8080";
+builder.WebHost.UseUrls($"http://*:{port}");
+
+var app = builder.Build();
+
+app.MapGet("/", () => "Hello from Scaleway!");
+
+app.Run();

containers/csharp-hello-world/README.md

@@ -0,0 +1,73 @@
+# C# .NET hello world
+
+This example demonstrates the deployment of a simple C# http service on Scaleway Serverless Containers.
+
+For this example, we will use the CLI to deploy the container, but you can use [other methods](https://www.scaleway.com/en/docs/serverless/containers/reference-content/deploy-container/).
+
+## Workflow
+
+Here are the different steps we are going to proceed:
+
+- Quick set-up of Container Registry to host our .NET container
+- Deploy the Serverless Container
+- Test the container
+
+## Deployment
+
+### Requirements
+
+To complete the actions presented below, you must have:
+- installed and configured the [Scaleway CLI](https://www.scaleway.com/en/docs/developer-tools/scaleway-cli/quickstart/)
+- installed [Docker](https://docs.docker.com/engine/install/) to build the image
+
+### Building the image
+
+1. Run the following command in a terminal to create Container Registry namespace to store the image:
+
+    ```bash
+    scw registry namespace create name=hello-dotnet
+    ```
+
+  The registry namespace information displays.
+
+1. Copy the namespace endpoint (in this case, `rg.fr-par.scw.cloud/hello-dotnet`).
+
+1. Log into the Container Registry namespace you created using Docker:
+
+    ```bash
+    docker login rg.fr-par.scw.cloud/hello-dotnet -u nologin --password-stdin <<< "$SCW_SECRET_KEY"
+    ```
+
+  At this point, you have correctly set up Docker to be able to push your image online.
+
+1. In a terminal, access this directory (containing the Dockerfile), and run the following command to build and tag the image:
+
+    ```bash
+    docker build --platform linux/amd64 -t rg.fr-par.scw.cloud/hello-dotnet/dotnet:v1 .
+    ```
+
+1. Tag and push the image to the registry namespace:
+
+    ```bash
+    docker push rg.fr-par.scw.cloud/hello-dotnet/dotnet:v1
+    ```
+
+### Deploying the image
+
+In a terminal, run the following command to create a Serverless Containers namespace:
+
+    ```bash
+    scw container namespace create name=hello
+    ```
+    The namespace information displays.
+
+1. Copy the namespace ID.
+
+1. Run the following command to create and deploy the container:
+
+    ```bash
+    scw container container create namespace-id=<PREVIOUS_NAMESPACE_ID> name=hello registry-image=rg.fr-par.scw.cloud/hello-dotnet/dotnet:v1
+    ```
+    The container information displays.
+
+1. Copy the DomainName (endpoint) to test your container, you can put the endpoint in your web browser for testing.